It's basic, libsec-ril.so is for sim card.
If your sim card is working before download Lineage OS you simply no need to download baseband/upgrade modem.
1.Need Root device
Example Magisk, SuperSU
2.Need Root File Manager
Example Root Explorer
3.Replace this file
Root/System/Lib/libsec-ril.so
0.How to get working sim card libsec-ril.so ?
-Find Lineage OS previous version that can make your sim card exist in your phone.
-Flash rom to that old version.
-Go to Root/System/Lib/ and backup libsec-ril.so
-Flash rom to new version and go to step 3 to replace file
-Turn Airplane mode on off, if not working reboot.
Or you can use this link to download libsec-ril.so
drive.google.com/file/d/0B8Z3Yq1NlXEfeEVlaFcxSGVXR0U/view?usp=drivesdk
Im sure file in that link is working for all note3 hlte if not please go to step 0
If you find anyone got problem like this, please help them, spread the solution.
Congrats Lineage OS team, for messed up basic thing in phone.
If your sim card is working before download Lineage OS you simply no need to download baseband/upgrade modem.
1.Need Root device
Example Magisk, SuperSU
2.Need Root File Manager
Example Root Explorer
3.Replace this file
Root/System/Lib/libsec-ril.so
0.How to get working sim card libsec-ril.so ?
-Find Lineage OS previous version that can make your sim card exist in your phone.
-Flash rom to that old version.
-Go to Root/System/Lib/ and backup libsec-ril.so
-Flash rom to new version and go to step 3 to replace file
-Turn Airplane mode on off, if not working reboot.
Or you can use this link to download libsec-ril.so
drive.google.com/file/d/0B8Z3Yq1NlXEfeEVlaFcxSGVXR0U/view?usp=drivesdk
Im sure file in that link is working for all note3 hlte if not please go to step 0
If you find anyone got problem like this, please help them, spread the solution.
Congrats Lineage OS team, for messed up basic thing in phone.